Malicious PDF — malware analysis report

Static analysis result for SHA-256 4077da06d5129a77…

MALICIOUS

PDF

199.8 KB Created: 2021-06-13 07:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 177f401921ba2f25c74917bac881eb44 SHA-1: 9e5a252533080618850211f0928ea00d500985f2 SHA-256: 4077da06d5129a77787d694c2f2d18855304b5829833f17a05d8e82f06569c9d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded URLs that lead to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing due to the nature of the URLs. Although no scripts were explicitly extracted, the presence of PDF_URI and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics points towards the document's role in directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://huntic.ru/uplcv?utm_term=watchmen+alan+moore+and+dave+gibbons PDF link annotation
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e857ocmejen19cloc15drdcnmv/luvazaj.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b7323799b12---65635038735.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/vcra8n3o53nsdij3q12lib3u42/bizugufolapelomudowuwoj.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725816e3b00---wafapinifezejab.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/bstqv555a2b4m6ckmkm1l9bspf/nekosisi.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/1fd09aadbba4cd5da4121dc3a40f1ca8/mikimasefelulesikugej.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b594d494d3b---pakapozegulipig.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c302ef55f49---pesejimepu.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/nozamola.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/6c8f35577714c083a96165024ac099f6/zalamirebuvesixifojiga.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/31681527345.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/taponolobakajoti.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/a000f1334de1364104f78c5776b822fa/86642690206.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dfdd386c8---5779518702.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/02ffp4qsn6oaps9m3nqmgppu62/zunuvigigiriredevej.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ed3ccd8a2---tedufixodeluf.pdfIn PDF document text
    • http://metallpress.ru/files/ruxeporiduti.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b460ea9c502---mawutepoluretujukufo.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/6f391d424048618c35e4a720d1d6a0df/54388590963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002bec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BEC1 5564 bytes
SHA-256: 1569f2cfea6d3f42b40f307bdf863187ca540fe11c98219652cdcbf4b38d2da4
font_01_sfnt_off0002d193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D193 12676 bytes
SHA-256: 103445dd8a7e25968cc63d15101981cb83debbe24a0026e0393a5347f60974fb
font_02_sfnt_off0002fc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC28 16120 bytes
SHA-256: 184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832